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清晨醒来想工作产生精神压力
http://www.100md.com 2001年7月26日 家庭医生医疗保健网
     路透社纽约健康消息 众所周知,工作带来压力,谁都能感觉到。 最新研究发现,人们在星期一早上醒来,一想到工作,也会产生压力,使体内应激激素升高。

    伦敦大学的安德鲁·斯泰普托博士领导的研究小组对75名男女进行的研究发现,受试者体内的应激激素皮质醇在工作日早上比非工作日早上明显升高。由于这种升高是在醒来之后30分钟内发生的,可见仅仅“预想一下”工作就可以引起这种与工作有关的压力感。日前,斯泰普托博士在加利福尼亚州蒙特雷召开的美国心身学学会年会上宣布了他们的研究结果。

    该研究主要是检测参加者唾液中的皮质醇含量。分别在醒来之后即刻、醒后30分钟取样,然后每2小时取样直到深夜。一天中,皮质醇的水平在清晨是最高的。 工作日早上醒后30分钟有一个急剧的上升。在工作日其余时间里的皮质醇水平类似于非工作日。以前的研究也发现类似的结果。有证据表明皮质醇的清晨增高在那些工作压力大的人群中最明显。
, 百拇医药
    斯泰普托认为,皮质醇的增高可能是对将要开始的工作和即将要面对的要求做出准备的生物学标识。

    皮质醇在新陈代谢、血压和心血管功能等方面起着重要调节作用,并且能抑制免疫系统活动,有助于机体对应激产生应答,动员机体,使机体有备于剧烈活动。人体内皮质醇水平在一天内会有正常的波动,清晨最高,然后在下午和上午逐渐下降。过多的皮质醇有对心,脑、新陈代谢和其它机体功能都有负面影响,因此研究日常应激对皮质醇水平的影响非常重要。

    Just Thinking About Work May Trigger Stress

    NEW YORK (Reuters Health) - While on-the-job stress is a well known and widely felt presence, new research suggests that even thinking about Monday morning may send people‘s stress hormones upward.
, 百拇医药
    In a study of 75 men and women, UK researchers found that the participants showed steeper increases in the stress hormone cortisol on workday mornings than on days off. Since this rise occurred within 30 minutes of waking up, the mere ``anticipation‘‘ of work may trigger job-related stress, according to Dr. Andrew Steptoe and his colleagues at University College London.

    Steptoe presented his team‘s findings last week in Monterey, California, at the annual meeting of the American Psychosomatic Society.
, 百拇医药
    Cortisol levels naturally wax and wane over the course of a day, peaking in the morning and declining through the afternoon and morning. The hormone plays a key role in regulating metabolism, blood pressure and cardiovascular function, and it suppresses immune system activity. Cortisol also helps the body respond to stress, mobilizing the body and preparing it for vigorous activity.

    But excessive cortisol levels are believed to wear on the heart, brain, metabolism and other bodily functions. That is why it is important to study the effects of everyday stress on cortisol concentrations, Steptoe told Reuters Health.
, http://www.100md.com
    In the study, he and his colleagues measured cortisol levels in the participants‘ saliva. Samples were taken immediately upon waking, 30 minutes after waking, and then every 2 hours until late evening. Regardless of the day, the participants‘ cortisol levels were highest in the morning. However, the sharpest increase occurred 30 minutes after waking on workdays.

    What was most interesting in these findings, Steptoe said, was that cortisol levels during the rest of the workday were similar to those on days off. Earlier research, he noted, has shown similar results, with some evidence suggesting the early-morning increase in cortisol is greatest among people with high job stress.

    ``The cortisol rise,‘‘ Steptoe said, ``may be a biological marker of our preparation for the working day, and for the demands we are about to confront.‘‘, 百拇医药


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